Improvement in circular-saw mills



UNITED STATES ORRIN L. JENKS, OF PORT HURON, MICHIGAN.

PATENT OFFICE.

IMPROVEMENT IN CIRCULAR-SAW MILLS.

Specification forming part of Letters Patent No. 179,3 [8, dated June27, 1876} application filed August 27, 1875.

To all whom it may concern Be it known that I, ORRIN L. JENKs, of PortHuron, in the county of St. Clair and State of Michigan, have inventednew and useful Improvements in Circular-Saw Mills; and I do herebydeclare that the following is a full and exact description of the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon.

It has hitherto been found impracticable to use circular saws in gangs,for the purpose of sawing an entire log into lumber by one passage ofthe saws through it, on account of the tendency of the saws to heat, andthereby lose their rigidity and change their linear integrity. Thistendency to heat is caused by the pressure and friction, upon both sidesof each saw, of the lumber which is being cut, which tendency is farmore marked than in the use of a single saw, which, in cutting, has uponone side only the pressure of a single board, which board, in practice,is wedged apart, if necessary.

Many efforts have been made to use circular saws in gangs for sawinglumber, in order to make use of the momentum of the saws moving alwaysin the same direction, and thus avoid the loss of the power required inreciprocating saws to overcome the inertia at the end of each stroke.

The purpose of my invention being the use of circular saws in gangs forsawing lumber, the invention therein consists in the means, hereinafterdescribed, for applying small jets of water continuously to the surfacesof saws in a gang; in the water being discharged through a series oftubes provided with perforations near their upper ends, and connectingwith a suitable water-supply, all as more fully hereinafter explained.

In order to enable those skilled in the art to make and use myinvention, I proceed to describe the same more particularly, havingreference to the drawings, making part of this specification, whereinthe figure represents a front elevation of a gangof saws in position,with the sprinkling device arranged for use.

In the drawings, the circular saws A, in any number required for use,and of any ordinary or usual construction, are placed and secured in anyconvenient Way upon the arbor, and separated the proper distances apartby movable annular collars O. The arbor is secured upon an ordinaryshaft, D, which turns in proper boxes, and, for convenience in removingand replacing the saws, the arbor, at the opposite end, isjournaled andturns upon a short rigid arm, E. A water-pipe, G, is placed in anyconvenient position, under or by the side of the saws, out of the way ofthe logs to be sawed, and is furnished with hollow fingersf, extendingup between the saws, and provided with perforations for the discharge ofwater upon the saws.

The advantages of my construction are too obvious upon inspection toneed particular statement.

What therefore I claim as my invention, and Wish to secure by LettersPatent, is-

In combination with circular saws arranged in a gang, a series of tubesprovided with perforations near their upper ends, and a connectingsupply water-pipe, for the purpose of discharging jets of watercontinuously upon each side of such saws, substantially as described andshown.

This specification signed and witnessed this 26th day of August, 1875.

v ORRIN L. JENKS. Witnesses:

CHARLES THURMAN, R. N. DYER.

